Deep well pump



gamma Feb 1939. H A THOMPSON DEEP WELL PUMP 3 Sheets-Sheet 1 Filed Jan. 4, 1957 INVENTOR.

' Feb. 28, 1939. H. A. THOMPSON DEEP WELL PUMP Filed Jan. 4; 195'? 3 Sheets-Sheet 3 m way .4

' INW OR. 1 A. mam Jan PatentedfFeB. 2a,- 1939 uurrso srarss PAT NTYOF I E JC DEEP WELL PUMP h. hliompson, mslltuuelw, Walli one: u or oil. one-half to tlorhett mohair, tri

melee,

I illumination it, WW, ElertalNo. iii-Wm 'o slum (or, im une) This invention relates to and heater an ohieet the proliislonv of a deep well pump which consul tutes improvements in the art and will be superior to deep well pumps as heretofore used, in point of a larger pumping capacity, reliability of performance, more even torque and consequent elimination ofcounterbalancing means, aocessi-r bility of parts. for repair and renewal thekof, eiiective elimination oi! sand, and longer life due to dividing the pumping operation between separate pumping means loceted adjacent tothe top and 7 bottom of the well respectively.

Another object of the invention is-to provide a deep well pump of the character described, wherein the efliclency thereof is greatly increased by reason of the provision of a pump unit within and adjacent to the top or the well, and asimilar pump unit at the bottom of the well, and separable operatlng means which simultaneously operate said pump units, said pump units .being also adapted for independent operation.

A further object 01 this invention is to provide a deep well pump of the character described, having a novel and efllcient pump plunger or piston construction and arrangement, including a pump barrel liner having a tapered bore for expanding and contracting rings in said plungers, whereby to insure an elective sealing action or said rings.

1 have shown in the. accompanying drawings a preferred form. of apparatus embodying my said improvements. subjectto modification within the scope of the appended claims without departin from the spirit of my invention.

Referring to the drawings:

Fig. 1 is a fragmentary sectional view otthe pump of this invtion as when installed inn well, the sectioned portions of the walking beam structure being taken on the plane otline l---i of no. 2. 1

Fig. 2 is a top plan view oi the walking beam operating means for the pump.

, Fig. 3 is a front elevation of the means shown in Fig. 2.

Pig, 4 is an enlarged fragmentary view of the upper pump unit.

Elm-5 is an enlarged fragmentary vertical 'section or the lower pump unit.

Fig. dis a side elevation partly in section oi a fishing tool for removing the footval've of, the pump.

m. 11 is is enlarged view; partly in elevation and in section or the footyaive of the pump.

'Flg. 8 is an enlarged side elevation partly in section oi the root valve fishing tool as when hooked will be making its return or downstroke, andunnecessary and a'small; inexpensive and eco 5 by means of a yoke link i9; l'he other walking One form or the deep well pumping apparatus 10 or this invention, as Shown in the accompanying drawings, generally comprises a well tubing 3 having a removable toot valve 6 and containing adiaoent to the upper and lower extremities of the well an upper pump-unit A and a lower pump unit it -28; The upper unit will be located, for example, about thirty feet from the top 01! the well and ,is-

operated-by a tubular sucker rod 5, actuated by a walking beam 8. A motor I or other prime mover, actuates a crankshaft 8 through a belt drive rrneans 9,,and said crank shaft is connected with i the walking beam 6 by a connecting mews.

The lower pump unit i is located at the bottom oi the well, and is actuated by a sucker rod H which is slidable freely in the tubular sucker rod- 5 and connected with a walkingbeam [2; This beam I2 is connected with the crank shaft II by means of the connecting rod It. With this arrangement, the pump units will be simultaneously operated so that when the plunger or piston ll of the upper pump A is making its upward or-pumping'st'roke,

the piston or plunger II of the lower pump unit B vice versa. During this operation the oil orother fluid in the wellwill be caused to flow through'the valved outlet 18 at the top of the well. i

- It will now be seen that the lifting and porn ing loadis divided between the pump units A and B, whereby toclncrease the flow trom'the well. Furthermore, the two pump units actu ated by thewalking beams as hereinbefore noted, provide tora smoother pumping operation with omparatively short plunger strokes, and with less: torque, whereby oounterbalancing means is 45 nomically operated prime mover may be used. I

' As here shown, the walking beam 6 for the upper pump unit A is iulcmmed at i] on a stand it, and is connected with the tubular sucker rod beam I2 is fulcrumed at 29.011 the upper. side of the beam 6, and is connected with the sucker rod I i by means of the links 2!. To provide for an increased leverage oi the beam. 12,, since it has the heavier working load, the crank throw 22 55 of the shaft isfmade longer than the throw connected with the beam 6,. and the fulcrum 20 is located forwardly of the fulcrum IT.

The pump units A and B are nearly identical as to construction and each comprises a barrel 23 joined to the tubing by the offset couplings 24 which define shoulders that engage the ends of a tubular liner 25. This liner has a tapered bore in which the pump piston (i4 or I!) has a working fit. The pistons l4 and i5 of the units A and B are substantially identical and each comprises a tubular body 26 having an internally thmded lower end in which a tubular intakew member 21 is screwed. Seated against the inner end of this member is an annular valve seat 28. The piston has a ball check valve 29 having a central opening Oil whereby the valve is slidably supported on the tubular sucker rod 5 and movable into and out of engagement with the seat 28. A bushing 3| is screwed into the bore of the piston body 26, and engages and holds the seat in place as shown in Fig. 4. This bushing has a spider 32 supporting a collar 33, through which the lower end of the rod 5 is extended. It is thus seen that the sucker rod Ii extends freely through the valve opening ill without interfering with the operation of the valve or the piston l4. A flanged nut or cap 34"is screwed into the bore of the body 26 of piston i4 and has a threaded connection 35 with the tubular sucker rod whereby to screw the piston to said rod. This ton ll.

The piston ll of the pump unit B has a ball check valve 31 of the usual type, held in place by the cage 38 and operating against the seat 28. A cap I! is screwed into the upper end of the body 28 of the piston i5 and has a threaded connection 4| with the sucker rod ll, whereby to secure said piston to said rod. The cap 39 has openings 4| to permit passage of oil through the piston I 5.

A feature common to the pistons of both pump units is an annular sand brush 42 surrounding the lower end of the piston body 26, and held in place between a nut 43 and flat split ring 44 which latter rests on a shoulder 45. This brush could be formed as a .split and resilient piston ring to insure an effective sweeping action on the liner 25. Sand will collect in the annular pocket 48 below the brush and will be induced through the passages '41 by the flow of oil through the piston whereby the sand will be carried off with the stream of oil pumped out of the well. The piston I 5 for thepump unit B is provided with a sand brush 4! at its upper end, arranged to prevent the entry of sand between the liner and said piston. As here shown the pistons of both pump units have a plurality of split piston rings 49, seated in especially formed grooves". These "grooves" are formed by setting flat and split spring rings 50 and 5| vertically and horizontally around the piston body 25, between the shoulders formed by the central flange 52 and the cap 34 and nut 43. The piston rings 49 are seated between the horizontal rings 5i, which latter are spaced by the vertical rings 50. By this arrangement the rings 48 are seated in tensioned "grooves" and therefore are caused to be free, yet under tension throughout the contact surfaces thereof, whereby to more closely engage the bore of the liner 15. As the bore of the liner 2! is tapered, it is seen that the rings are expanded and contracted during the strokes of the piston and are prevented from "freezing or sticking in the grooves. It is now seen that the pistons i4 and I5 are constructed so that wear on the parts will be minimized and replacement thereof when necessary may be readily effected.

The foot valve 4 is formed with a tubular body 53, having a ball check valve 54 therein, and a conical lower end 55 which is frictionally seated in the well tubing as shown in Fig. '7. At its upper end the body 53 is formed to receive a bayonet coupling member 56, threadedly connected therewith, and said member is formed with a conical centering projection 51 on its upper end. A flshing tool 58 having hook like projections 59 is provided to facilitate removal of the foot valve, the hook like projections 59 adapted to be interlocked with the member 58 upon appropriate turning of the tool. I

In the operation of the pump, the crank shaft, when operated by the prime mover, will alternately rock the walking beams 6 and II, whereby, for example, to raise the piston I5 of the lower pump unit B while the piston i4 of the upper pump unit A is moved downward on its return stroke, and vice versa. In this way the pumps A and B are alternately operated to raise the oil and cause the flow thereof out of the well and the pumping load is divided between said pumps whereby to increase the life of the pumping apparatus and increase the flow from the well, with a smooth torque and without employing counterbalancing devices. This arrangement also permits of the use of a small amount of power and provides for a more economical pumping of a well, due to the counterbalancing effect of the two pumping units and the smooth, even operation thereof, from a single prime mover. The upper unit A will relieve the load on the lower unit B, and vice versa, in being alternately operated to pump, while the pistons of both units are simultaneously moved in opposite directions.

Any suitable means may be employed to effect a straight line motion of the sucker rod II, and as here shown, may comprise the upward extension of the sucker rod through a slot 60 in the beam l2, together with a fixed guide ii on some stationary part of the rig and through which said sucker rod is freely slidable.

Instead of arranging the beams 6 and I! as shown in Figs. 1, 2 and 3, I may arrange them as'shown in Figs. ll, 12 and 13, wherein the beams O are supported on castings 62 and affixed thereto by U bolts 53, and said castings are pro-, vided with pintles 84, which are journaled in the stands It. On the beam II, which is located between the beams 6, is a similar casting 65, having pintles 65 Journaled in the casting, as particularly shown in Fig. 11, it being noted that the fulcrum of the beam i2, though located forwardly of the pintles 64, is co-planar with the latter when the beams are in horizon- -tal position. The forward location of the fulcrum of the beam l2 provides for greater leverage and otherwise accomplishes the advantages ascribed to the beam I! of the arrangement of Figs. 1, 2 and 3, but in an improvedmanner,

shackles M on the beams t. with this arrangement the'beams 6 operate to rock said lever so that the angle otthe head 58 is changed while the beam it is rocked, whereby the sucker rod I! will travel in a straight line at all times.

I claim:

1. A. deep well pump comprising independent pump units adapted to be positioned adjacent to the upper and lower extremities of a well, independent sucker rods for operating said pump units and means for simultaneously raising and lowering said rods for eflecting the pumping stroke of one pump unit while the other is making its return stroke'and vice versa, said means including walking beams, a crank shaft having ofi'set throws connected with and for operating said beams, and a prime mover for operating said crank shaft, one of said walking beams having its fulcrum point located on and out of saline-- ment with the fulcrum point of the other beam.

2. 'A' deep well pump comprising independent pump units adapted to be positioned adjacent to the upper and lower extremities of a well, independent sucken rods for operating said pumpunits and means for simultaneously raising and lowering said rods for eflecting the pumping stroke, of one pump unit while the other is making its return stroke and vice versa, said means including walking beams, a crank shaft having offset throws connected with and for operating said beams, and a prime mover for operating said crankshaft, one of said walking beams having its fulcrum point located on and out of alignment Wlti'l the-imam point oi the other he, and said crank shait having one throw longer than the other.

3.. A deep well pump comprising independent pump units adapted to be positioned within a well, independent sucker rods for operating said units and means for simultaneously raising and lowering said rods and efiecting thepumping stroke of one pump while the other pump is making its return stroke, and vice versa, including a stand, a walking beam, a casting on said beam, having pintles mounted on said stand, another walking beam fulcrumed on said casting at a point forwardly of said pintles, and means for rocking said beams.v

4. A deep well pump comprising independent pump units adapted to be positioned within a well, independent sucker rods for operating said units and means for simultaneously raising and lowering said rods and eflecting the pumping stroke oi one pump while the other pump is making its return stroke, and vice versa, including a stand, a walking beam, a casting on said beam, having pintles mounted on said stand, another walking beam fulcrumed on said casting at a point forwardly of said pintles, a lever pump unit, means for pivotally connecting the other end of said lever with the first named walking beam and means for rocking said beams.

' HENRY A. THOMPSON. 

